I would either go with Liberty caps or Panaeolina foenisecii (haymakers) Those are super common around the west but since this near a wood line in tall grasses... could be some caps there. I would have picked them and let the Tree Hugger have first dibs...

this happened to me about 2 months ago at sprain ridge park yonkers ny. The only difference is i had a knee/shin pads and giro switchblade. giro saved my already fractured jaw but it almost knocked me out. 30 minutes later i had a hot soup and a beer.